JP6775377B2 - Flow path switching valve and heat medium system for automobiles - Google Patents

Description

The present invention relates to a flow path switching valve and a heat medium system for an automobile using the flow path switching valve, and distributes cooling water for cooling a heat source such as an internal combustion engine or a lithium battery to various heat accessories. It relates to a flow path switching valve used for the purpose, and a heat medium system for an automobile using the flow path switching valve.

In a general automobile, the cooling water is circulated to the radiator to dissipate the heat of the cooling water for cooling the internal combustion engine to the outside, or the high-temperature cooling water is circulated to the heating device to heat the passenger compartment. For such purposes, cooling water is distributed to various thermal accessories by using a flow path switching valve.

As a flow path switching valve that distributes the cooling water for cooling the internal combustion engine of an automobile to various thermal accessories, for example, Japanese Patent Application Laid-Open No. 2015-59615 ( Patent Document 1 ) is described. The flow path switching valve described in Patent Document 1 rotatably accommodates a valve body, which is a bottomed cylindrical valve body having a closing wall on one side and an opening portion on the other side, in a housing body. There is a rotary type flow path switching valve that switches the flow path according to the rotation position of the valve body, and the valve is opened by overlapping the opening of the communication passage formed in the housing body and the opening formed in the outer peripheral portion of the valve body. , The cooling water flowing in from the inflow port, which is the open end of the valve body, is distributed to various thermal accessories of the automobile through the opening of the valve body and the communication passage of the housing body.

JP-A-2015-59615

By the way, in this flow path switching valve, it is necessary to regulate the rotation range of the valve body, for example, a first regulation position for determining the initial position and a second regulation position for determining the maximum rotation position are required. Therefore, in Patent Document 1, a restricting piece extending outward in the axial direction is provided on the outermost peripheral edge of the closing wall of the valve body as shown in FIGS. 9 and 10, or the valve body is provided as shown in FIGS. 11 and 12. A regulatory piece extending outward in the radial direction is provided on the outermost peripheral edge of the closed wall.

However, in Patent Document 1, the restricting piece is provided axially outward from the closing wall of the valve body, or the restricting piece is provided radially outward from the closing wall of the valve body. The shape of the valve accommodating portion formed in the housing body must be increased in the axial direction or the radial direction by this amount. Therefore, the overall physique of the flow path switching valve becomes large, and for example, the ratio of the occupied volume of the flow path switching valve in the engine room of the automobile becomes large, which is not preferable.

An object of the present invention is to use a novel flow path switching valve capable of suppressing a large valve accommodating portion for accommodating a valve body and regulating the rotation range of the valve body, and a flow path switching valve. The purpose is to provide a heat medium system for automobiles.

Here, the present invention is not limited to the cooling water of the internal combustion engine, and is also applicable to the cooling water for cooling a heat source such as a lithium battery. Therefore, the cooling water is a heat medium, and the internal combustion engine and the lithium battery can be paraphrased as a heat source.

The feature of the present invention is that one end is closed by a closing wall and the other end is opened by an opening portion in a part of the closing wall of the bottomed cylindrical valve body extending in the axial direction, and the opening portion in the axial direction of the valve body. A regulated portion extending inward toward the side is formed, and the rotation range of the regulated portion formed on the closed wall is restricted on the end face wall formed in the valve accommodating portion so as to face the closed wall of the valve body. There is a regulatory department that is formed.

According to the present invention, the regulated portion that regulates the rotation range of the valve body has a shape that extends inward toward the open portion side in the axial direction of the valve body, so that the shape of the valve housing portion is not enlarged. The rotation range of the valve body can be regulated, and it becomes possible to suppress an increase in the physique of the flow path switching valve.

It is a block diagram of the cooling system of the internal combustion engine as an example to which the flow path switching valve of this invention is applied. It is a top view of the flow path switching valve which becomes embodiment of this invention. It is an exploded perspective view of the flow path switching valve shown in FIG. It is sectional drawing which cross-sections in the lateral direction around the communication passage connected to the oil cooler of the flow path switching valve shown in FIG. It is an overall perspective view of the valve body which becomes embodiment of this invention. FIG. 5 is a cross-sectional view taken along the axis of the valve body shown in FIG. 5 at positions AA. FIG. 5 is a cross-sectional perspective view of a part of the housing body according to the embodiment of the present invention. It is a bottom view of the flow path switching valve according to the embodiment of the present invention shown in FIG. FIG. 5 is a cross-sectional view taken along the axial direction of the flow path switching valve shown in FIG. 2 at the position BB. FIG. 5 is a cross-sectional view taken along the axial direction of the flow path switching valve shown in FIG. 2 at the position CC.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following embodiments, and various modifications and applications are included in the technical concept of the present invention. Is also included in that range.

Before explaining the embodiment of the present invention, the configuration of the flow path switching valve to which the present invention is applied will be briefly described. However, as described above, in the following description, when the cooling water of the internal combustion engine is used as the heat medium. Is shown as an example. However, the present invention is not limited to the cooling water of an internal combustion engine, and is also applicable to a heat medium for cooling a heat source such as a lithium battery.

In FIG. 1, cooling water is supplied to the cylinder jacket of the internal combustion engine 01 from the cooling water pump 02, and the cooling water that cools the cylinder jacket is sent to the flow path switching valve 10, and a part of the cooling water is always sent via the thermostat. It is returned to the suction side of the cooling water pump 02 again for circulation. Further, the remaining cooling water is sent to heat accessories such as the heating device 03, the radiator 04, and the oil cooler 05. It should be noted that these thermal accessories are shown as examples, and other thermal accessories may be used.

The distribution of the cooling water to these thermal accessories is controlled by the electron flow path switching means 06. For example, water temperature information from the water temperature sensor 07 provided in the flow path switching valve 10, operating state information of the internal combustion engine 01, and operating state information of various operating devices in the vehicle interior are input to the electronic flow path switching means 06. The flow path to each thermal auxiliary machine is switched according to the control signal calculated by the electronic flow path switching means 06.

As will be described later, the flow path switching valve 10 has a built-in electric motor, and the rotation of the electric motor is controlled by a control signal from the electronic flow path switching means 06. The valve body is fixed to the electric motor, and by rotating the valve body, cooling water flows through the communication passages connected to the heat accessories formed in the flow path switching valve 10, and the cooling water from the internal combustion engine flows. Is distributed to each thermal auxiliary machine.

FIG. 2 shows the appearance of the flow path switching valve 10, and the housing body 11 includes a connection pipe 12A connected to the cylinder jacket, a connection pipe 12B connected to the heating device 03, a connection pipe 12C connected to the radiator 04, and an oil cooler 05. A connecting pipe 12D for connecting is provided. Further, cooling water flows into the flow path switching valve 10 from the internal combustion engine 01, and the cooling water is distributed to the connecting pipes 12A to 12D by the valve body provided inside the housing body 11.

The flow path switching valve 10 is provided with a cover 17 that covers the thermostat filled with wax, and controls the cooling water flowing through the connecting pipe 12A by the temperature. Further, an electronic flow path switching means 06 is fixed to the top of the housing body 11 of the flow path switching valve 10 to control an electric motor housed inside the housing body 11.

FIG. 3 shows a configuration in which the flow path switching valve 10 shown in FIG. 2 is disassembled and viewed from an oblique direction. The housing main body 11 is formed with a valve accommodating portion (see FIGS. 4, 7, etc.) for accommodating the hollow cylindrical valve main body 14, and a motor accommodating portion 16 for accommodating the electric motor 15. Further, the electronic flow path switching means 06 is fixed to the housing main body 11 from the outside by fixing bolts, and is configured as a so-called mechanical / electrical integrated type.

Further, a connection pipe 12A connected to the cylinder jacket, a connection pipe 12B connected to the heating device 03, a connection pipe 12C connected to the radiator 04, and a connection pipe 12D connected to the oil cooler 05 are attached around the housing body 11. A cover 17 for covering the thermostat 13 is integrally formed on the connecting pipe 12C. Here, the seal member 18 and the compression spring 19 are arranged between the housing main body 11 and the connecting pipes 12B to 12D. The seal member 18 is formed in a circular tubular shape with both ends open, and its tip surface is pressed and brought into contact with the outer peripheral portion 20 of the valve body 14 by a compression spring 19.

The valve body 14 is formed in a bottomed cylindrical shape, and an opening 21 connected to each of the connection pipes 12A to 12D described above is formed in the outer peripheral portion 20 thereof. Accordingly, the cooling water is pumped from the cooling water pump 02 shown by the arrows CA flowing from the internal combustion engine is one flowing in the connection pipe 12A～12 D through the opening 21.

A closing wall 22 is provided on one side of the valve body 14, and the closing wall 22 is fixed to the rotating shaft 23 and is rotated in the valve housing portion of the housing body 11 in synchronization with the rotation of the rotating shaft 23. It is a thing. In synchronization with this rotation, the valve body 14 selects (switches the flow path) the connection relationship with each of the connection pipes 12A to 12D. Since the degree of overlap of the seal member 18 with the opening can be controlled by the rotational state of the valve body 14, the opening 21 may be operated to control the flow rate.

The electric motor 15 and the valve body 14 are connected by a worm gear mechanism. That is, a worm wheel 24 is fixed to the opposite end of the rotating shaft 23 to which the valve body 14 is fixed, and the worm wheel 24 is meshed with the worm 25 formed on one of the worm shafts. .. Further, the worm wheel 26 formed on the other side of the worm shaft is meshed with the worm 27 fixed to the electric motor 15. Therefore, when the electric motor 15 rotates, this rotation is transmitted to the rotating shaft 23 via the worm 27 ⇒ worm wheel 26 ⇒ worm 25 ⇒ worm wheel 24, and finally the valve body 14 is rotated.

Further, a cover provided with the electronic flow path switching means 06 is fixed to the housing main body 11 so as to cover the electric motor 15 and the worm gear mechanism. The control signal from the electron flow path switching means 06 is given to the electric motor 15 and is operated so as to perform a predetermined rotational operation.

Next, with reference to FIG. 4, a configuration in which the vicinity of the communication passage connected to the oil cooler 05 of the flow path switching valve 10 is cross-sectionally described will be described. In FIG. 4, the housing main body 11 is integrally formed with a valve accommodating portion 28 for accommodating the valve main body 14 and a motor accommodating portion 16 for accommodating the electric motor 15. The valve body 14 is rotatably stored inside the valve accommodating portion 28, and is rotated by the rotation shaft 23 described above. A connecting passage 29 is formed in the housing main body 11 in a direction orthogonal to the tangent line of the outer peripheral portion 20 of the valve main body 14, and is connected to the oil cooler 05 so as to be fitted into the communication passage 29. Is installed. A thermostat 13 is attached to substantially the opposite side of the thermostat 13, and is subsequently connected to the connecting pipe 12A.

A tubular seal member 18 having both ends open is arranged between the communication passage 29 and the outer peripheral portion 20 of the valve body 14, and the seal member 18 is the end surface of the connection pipe 12D fitted into the housing body 11. The compression spring 19 arranged in the valve body 14 presses and contacts the outer peripheral portion 20 of the valve body 14. The sealing member 18 is made of a synthetic resin that slides smoothly and has excellent shape stability, and in this embodiment, a fluororesin (polytetrafluoroethylene: PTFE) is used.

The opening 21 formed in the valve body 14 slides with the seal member 18 as the valve body 14 rotates, overlaps with the internal passage 30 formed in the seal member 18, and communicates with the inside of the valve body 14 and the communication passage 29. It connects with. Then, the cooling water from the internal combustion engine flows into the inside of the valve body 14 from the opening 31 on the opposite side of the closing wall 22 of the valve body 14 from the direction perpendicular to the paper surface, and the opening 21 formed in the valve body 14 is formed. It flows out to the internal passage 30, the communication passage 29, and the connecting pipe 12D of the seal member 18 via the above.

By the way, as described above, in the flow path switching valve 10, it is necessary to regulate the rotation range of the valve body, and a first regulation position for determining the initial rotation position and a second regulation position for determining the maximum rotation position are required. Is. Then, in the conventional flow path switching valve, a restricting piece is provided outward from the closing wall 22 of the valve body 14 in the axial direction, or a restricting piece is provided outward from the closing wall 22 of the valve body 14 in the radial direction. Therefore, the shape of the valve accommodating portion 28 formed in the housing main body 11 must be increased in the axial direction or the radial direction by this amount. Therefore, the overall physique of the flow path switching valve 10 becomes large, which is not preferable.

Therefore, in order to solve such a problem in the present embodiment, one end is closed by a closing wall, and the other end is a part of the closing wall of the bottomed cylindrical valve body extending in the axial direction opened by the opening portion. , A regulated portion extending inward toward the open portion side in the axial direction of the valve body is formed, and an end face wall formed in the valve accommodating portion so as to face the closing wall of the valve body is formed on the closing wall. It proposes a configuration in which a regulated portion that regulates the rotation range of the regulated portion is formed.

According to this, the regulated portion that regulates the rotation range of the valve body has a shape that extends inward toward the open portion side in the axial direction of the valve body, so that the valve housing portion does not have to be enlarged. The rotation range of the main body can be regulated, and it becomes possible to suppress the increase in the physique of the flow path switching valve.

Next, the specific configuration of the embodiment of the present invention will be described in detail with reference to FIGS. 5 to 10.

5 and 6 show the configuration of the valve main body 14, and the valve main body 14 is formed in a bottomed cylindrical shape in which a closing wall 22 is formed on one side and an opening portion 31 is formed on the other side. A plurality of openings 21 are formed in the circular outer peripheral portion 20 of the valve body 14, and these are selectively connected to the respective connecting pipes 12A to 12D, and are connected from the opening portion 31 to the inside of the outer peripheral portion 20. The inflowing cooling water is configured to flow out to the connecting pipes 12A to 12D. The selection of the connection state between the opening 21 formed in the outer peripheral portion 20 and the connection pipes 12A to 12D is appropriately combined by the heat accessories to be connected.

The closed wall 22 is formed with a circular fixing portion 32 that protrudes inward in the axial direction of the outer peripheral portion 20 near the center, and the rotating shaft 23 shown in FIG. 3 is fixed to the fixing portion 32. It has become. Therefore, the rotation of the electric motor 15 is decelerated and increased via the worm gear mechanism and given to the rotating shaft 23, further rotating the valve body 14.

The closed wall 22 around the fixed portion 32 is divided into two regions, a flat region portion 33 which is a first region portion and an inclined region portion 34 which is a second region portion. The inclined region portion 34 is formed in an inclined shape from the outer peripheral edge of the closing wall 22 toward the fixed portion 32 located on the axis of the valve main body 14 toward the open portion 31 side of the valve main body 14 with a predetermined inclination. .. On the other hand, the flat region portion 33 is formed in a flat shape orthogonal to the axial direction along the radial direction of the valve body 14.

Therefore, a step is formed between the flat region portion 33 and the inclined region portion 34, and the first regulation functioning as a regulated portion is formed in the step portion in a shape of a substantially right triangle when viewed in the axial direction. The wall 35Mi and the second regulation wall 35Mx will be formed along the axial direction. The first regulation wall 35Mi and the second regulation wall 35Mx are formed radially in the radial direction, and have a shape in which they come into surface contact with the first regulation piece 39Mi and the second regulation piece 39Mx, which will be described later. ..

Further, since the first regulation wall 35Mi and the second regulation wall 35Mx extend inward from the flat region portion 33 toward the opening portion 31 side in the axial direction of the valve body 14, they are shown in Patent Document 1. The structure does not protrude in the outward direction, and does not affect the size of the internal shape of the valve accommodating portion 28.

Here, the first regulation wall 35Mi has a function of determining the first regulation position which is the initial rotation position in cooperation with the first regulation unit described later, and the second regulation wall 35Mx is the second regulation wall 35Mx described later. It has a function of determining the second regulation position, which is the maximum rotation position, in cooperation with the second regulation unit. The angle of these regulated positions is arbitrary, but in the present embodiment, the angle of the flat region portion 33 is determined to be about 170 °.

Further, in the present embodiment, the inclined region portion 34 is formed, but the inclined region portion 34 may be a flat region portion, and a step is formed with the above-mentioned flat region portion 33. It suffices if the first regulation wall 35Mi and the second regulation wall 35Mx are formed in this portion. However, in this embodiment, the inclined region portion 34 is formed to facilitate the flow of the cooling water toward the communication passage 29 formed in the housing main body 11.

Next, the configuration of the valve accommodating portion 28 in which the valve main body 14 is accommodating will be described with reference to FIGS. 7 and 8.

In FIGS. 7 and 8, a valve accommodating portion 28 having a circular cross section perpendicular to the axial direction is formed in the housing main body 11, and the valve accommodating portion 28 is formed of a cylindrical side wall 36 and a side wall 36. It is composed of an end face wall 37 that closes one side, and the opposite side of the end face wall 37 is an open end. Therefore, in a state where the valve main body 14 is stored in the valve storage portion 28, the valve main body 14 is stored so that the closing wall 22 side faces the end face wall 37 of the valve storage portion 28.

A bearing fixing portion 38 extending in the axial direction toward the inside of the valve accommodating portion 28 is formed near the center of the end face wall 37, and the bearing fixing portion 38 makes the rotating shaft 23 shown in FIG. 3 rotatable. It is bearing. Further, a first regulation piece 39Mi and a second regulation piece 39Mx, which function as a regulation portion and extend inward from the end face wall 37 inward to a predetermined position of the bearing fixing portion 38, are integrated with the end face wall 37. Is formed in.

The first regulation piece 39Mi and the second regulation piece 39Mx are formed in a plate shape, and their hypotenuses extend from a predetermined position in the axial direction of the bearing fixing portion 38 to the outer peripheral edge of the end face wall 37. It is formed in the shape of a substantially right triangle when viewed in the axial direction. Therefore, the shapes of the first regulation piece 39Mi and the second regulation piece 39Mx, the first regulation wall 35Mi, and the second regulation wall 35Mx are substantially the same.

Then, with the valve body 14 incorporated in the valve accommodating portion 28, the first regulation piece 39Mi and the second regulation piece 39Mx are housed in the inclined region portion 34 of the valve body 14, and the inclined region portion 34 is formed. Within the range, the rotation operation of the valve body 14 is not restricted, and the valve body 14 further rotates and comes into contact with the first regulation wall 35Mi and the second regulation wall 35Mx, thereby restricting the rotation operation of the valve body 14. Is to be applied.

As shown in FIG. 8, the first regulation piece 39Mi and the second regulation piece 39Mx extend radially radially from the center of the bearing fixing portion 38, and the first regulation wall 35Mi and the second regulation wall 35Mi. When it comes into contact with the regulation wall 35Mx, it comes into surface contact. Therefore, the stress acting per unit area of the regulation pieces 39Mi and 39Mx and the regulation walls 35Mi and 35Mx can be reduced, and the durability can be improved.

9 shows a BB cross section of FIG. 2, and FIG. 10 shows a CC cross section of FIG. In FIGS. 9 and 10, the valve body 14 is housed in the valve storage portion 28 formed in the housing body 11. A rotating shaft 23 is fixed to the fixed portion 32 of the valve body 14, and the rotating shaft 23 is inserted through a bearing fixing portion 38 of the housing body 11 and is pivotally supported by a slide bearing 40. A worm wheel 24 is fixed to the end of the rotating shaft 23 on the opposite side to which the valve body 14 is fixed, and the rotational motion is transmitted from the worm 25.

These worm wheels 24 and worms 25 are covered liquid-tightly with a cover 41 provided with electron flow path switching means 06. An annular slide bearing 42 is fitted and fixed to the inner peripheral surface of the valve housing portion 28 of the housing body 11 on the open end side, and the outer peripheral portion 20 of the open portion 31 of the valve body 14 is slidable. I support it. Further, on the end face wall 37 facing the inclined region 34 of the valve body 14, a portion of the sliding bearing 40 of the bearing fixing portion 38, the pressure release passageway 43 for communicating the space formed by the housing body 11 and the cover 41 is It is formed. As a result, the pressure in the vicinity of the slide bearing 40 is released to the atmosphere side.

Here, as shown in FIG. 10, in the present embodiment, the communication passage 29 to which the connecting pipe 12B connected to the heating device 03 is attached is formed in the vicinity of the end face wall 37, so that the flow of the cooling water is smooth. , The communication passage 29 is formed within the operating range of the inclined region portion 34 of the valve body 14, and the flow path resistance is reduced. Therefore, since the cooling water can flow to the communication passage 29 along the inclined surface of the inclined region portion 34, the cooling water can smoothly flow to the communication passage 29 without receiving a large flow resistance in this portion.

In the above, the cooling water CA from the internal combustion engine flows to the connecting pipe 12C toward the radiator 04 and flows to the connecting pipe 12D toward the oil cooler 05 in FIG. Similarly, as shown in FIG. 10, the cooling water CA from the internal combustion engine flows to the connecting pipe 12B toward the heating device 03. The connection pipes 12A to 12D and the openings 21 formed in the valve body 14 are selectively connected according to the rotational state of the valve body 14.

Then, in the present embodiment, when the valve body 14 is rotated to the first regulation position side which is the initial rotation position by the electric motor 15, the first regulation piece 39 formed on the end face wall 37 of the valve housing portion 28 Since Mi is housed in the inclined region portion 34 formed in the valve body 14, the valve body 14 may rotate until the first regulation wall 35Mi formed in the closing wall 22 of the valve body 14 comes into contact with the Mi. It is possible, and finally, the first regulation wall 35Mi of the valve body 14 comes into contact with the first regulation piece 39Mi formed on the end face wall 37, and the rotation is restricted.

Similarly, when the valve body 14 is rotated to the second regulation position side, which is the maximum rotation position, by the electric motor 15, the second regulation piece 39 Mx formed on the end face wall 37 of the valve housing portion 28 also becomes the valve body. Since the shape is accommodated in the inclined region portion 34 formed in 14, the valve body 14 can rotate until the second regulation wall 35Mx formed on the closing wall 22 of the valve body 14 comes into contact with the final. The second regulation wall 35Mx of the valve body 14 comes into contact with the second regulation piece 39Mx formed on the end face wall 37, and the rotation is restricted.

As described above, according to the present embodiment, the first regulation wall 35Mi and the second regulation wall 35Mx that function as regulated portions are formed between the flat region portion 33 and the inclined region portion 34, and further. Since the first regulation wall 35Mi and the second regulation wall 35Mx are formed inward toward the opening portion 31 side in the axial direction of the valve body 14, the size of the internal shape of the valve housing portion 28 is large. It has no effect.

Further, on the end face wall 37 of the valve accommodating portion 28, a first regulation piece 39Mi and a second regulation piece 39Mx that regulate the rotational operation of the first regulation wall 35Mi and the second regulation wall 35Mx are formed. Further, the first regulation piece 39Mi and the second regulation piece 39Mx are housed in the inclined region portion 34 formed on the closing wall 22 of the valve body 14. Therefore, it is possible to prevent the length in the axial direction from becoming long while the valve body 14 is housed in the valve storage portion 28.

Further, since the rotational torque of the electric motor 15 is increased by the worm gear mechanism, the first regulation wall 35Mi and the second regulation wall 35Mx formed on the valve body 14 are the first regulation piece 39Mi and the first regulation wall 35Mx. An impact force may be generated by abutting the regulation piece 39Mx of 2 with a large force in a short time. As a countermeasure, the first regulation wall 35Mi, the second regulation wall 35Mx, the first regulation piece 39Mi, and the second regulation piece 39Mx come into contact with each other by surface contact, so that the stress can be reduced and the durability can be improved. Can be enhanced.

In this embodiment, two regulation pieces, a first regulation piece 39Mi and a second regulation piece 39Mx, are provided, which defines the relationship between the rotation range of the valve body 14 and the opening 21. Therefore, two regulation pieces are provided, but basically one regulation piece may be used.

Further, in the above description, the case where the discharge side of the cooling water pump 02 is connected to the valve storage chamber 28 and the cooling water flows out from the valve storage portion 28 to the communication passage 29 of the housing main body 11 is described. In some cases, the suction side of the pump 02 is connected to the valve storage chamber 28, and the cooling water flows from the communication passage 29 of the housing body 11 to the valve storage portion 28 side, but this type of flow path switching valve can also be applied. is there.

Further, in the above-described embodiment, the flow path switching valve that distributes the cooling water of the internal combustion engine to the heat accessories has been described, but the present invention is not limited to this, and the general flow for distributing the fluid is not limited thereto. It can also be applied to a path switching valve.

As described above, according to the present invention, one end of the valve body is closed by the closing wall, and the other end of the valve body is formed on a part of the closing wall of the bottomed cylindrical valve body extending in the axial direction opened by the opening portion. A regulated portion extending inward toward the opening side in the axial direction is formed, and a regulated portion formed on the closing wall is formed on the end face wall formed in the valve accommodating portion so as to face the closing wall of the valve body. The configuration is such that a regulation part that regulates the rotation range of is formed.

According to this, the regulated portion that regulates the rotation range of the valve body has a shape that extends inward toward the open portion side in the axial direction of the valve body, so that the valve housing portion does not have to be enlarged. The rotation range of the main body can be regulated, and the size of the flow path switching valve can be suppressed from becoming large.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

10 ... Flow path switching valve, 11 ... Housing body, 12A, 12B, 12C, 12D ... Connection pipe, 13 ... Thermostat, 14 ... Valve body, 15 ... Electric motor, 16 ... Motor storage, 17 ... Cover, 18 ... Seal Member, 19 ... compression spring, 20 ... outer circumference, 21 ... opening, 22 ... closed wall, 23 ... rotating shaft, 24 ... worm wheel, 25 ... worm, 26 ... worm wheel, 27 ... worm, 28 ... valve storage Part, 29 ... continuous passage, 30 ... internal passage, 31 ... open part, 32 ... fixed part, 33 ... flat area part, 34 ... inclined area part, 35Mi ... first regulation wall, 35Mx ... second regulation wall, 36 ... Side wall, 37 ... End face wall, 38 ... Bearing fixing part, 39Mi ... First regulation piece, 39Mx ... Second regulation piece, 40 ... Slide bearing, 41 ... Cover, 42 ... Slide bearing, 43 ... Pressure release aisle.

Claims (11)

One end is closed by a closing wall, the other end is formed in a bottomed cylindrical shape extending in the axial direction opened by the opening, and an opening through which fluid flows out is formed in the outer peripheral portion thereof, and the closing wall is formed. The valve body with a fixed rotation shaft and
A housing body having a valve storage portion in which the valve body is rotatably stored around the axis of the valve body, and a housing body having a passageway opened in the valve storage portion and connected to external auxiliary equipment.
The housing body and the cover fixed so as to cover the gear mechanism for driving the valve body via the rotation shaft are provided.
A regulated portion extending inward toward the open portion side in the axial direction of the valve body is formed on a part of the closing wall of the valve body.
A bearing fixing portion into which the rotating shaft is inserted is formed on an end face wall formed in the valve accommodating portion so as to face the closing wall of the valve body .
A regulating portion is formed on the end face wall so as to extend toward the closing wall of the valve body, is connected to the bearing fixing portion, and regulates the rotation range of the regulated portion formed on the closing wall. ,
Inside the restricting portion, a pressure relief passage is formed that communicates the space formed between the bearing fixing portion and the rotating shaft and the space formed between the housing body and the cover. A flow path switching valve characterized by this. In the flow path switching valve according to claim 1,
The regulated portion is formed with a step between the first region portion formed on the closed wall and the open portion side of the valve body from the first region portion formed on the closed wall. A flow path switching valve characterized in that it is composed of a regulation wall formed between the second region portion and the second region portion. In the flow path switching valve according to claim 2,
The first region portion formed on the closed wall is a flat flat region portion orthogonal to the axial direction of the valve body.
A flow path switching valve characterized in that the second region portion formed on the closed wall is an inclined region portion inclined toward the axis side of the valve body toward the open portion side of the valve body. In the flow path switching valve according to claim 3,
Two regulation walls are formed between the flat region portion and the inclined region portion, and at least one regulation portion formed on the end face wall of the valve accommodating portion is formed in the rotation range of the inclined region portion. A flow path switching valve characterized by being In the flow path switching valve according to claim 3,
Two regulation walls are formed between the flat region portion and the inclined region portion, and the two regulation portions formed on the end face wall of the valve accommodating portion are formed in the rotation range of the inclined region portion. A flow path switching valve characterized by being In the flow path switching valve according to claim 5,
The two regulating portions formed on the end face wall of the valve accommodating portion are characterized in that one regulates the initial rotation position and the other regulates the maximum rotation position. .. The flow path switching valve according to any one of claims 4 to 6.
A flow path switching valve, wherein the restricting portion formed on the end face wall of the valve accommodating portion is a plate-shaped restricting piece integrally formed with the end face wall. In the flow path switching valve according to claim 1,
The pressure release passage is a flow path switching valve characterized in that a fluid that has entered the inside of the bearing fixing portion is discharged into the space formed between the housing body and the cover. In the flow path switching valve according to claim 8,
The flow path switching valve is characterized in that the pressure release passage is formed obliquely with respect to the axis of the rotation shaft. A fluid pump that pressurizes and pumps a fluid that serves as a heat medium for cooling a heat source, a flow path switching valve that sends the fluid from the fluid pump to a plurality of auxiliary machines, or a fluid from the plurality of auxiliary machines. An automotive heat medium system with a flow path switching valve that feeds a fluid pump.
A heat medium system for automobiles, wherein the flow path switching valve according to any one of claims 1 to 9 is used as the flow path switching valve. In the automotive heat medium system according to claim 10.
The heat source is an internal combustion engine, and the accessories are at least a radiator, a heater, and an oil cooler.
The flow path switching valve is a heat medium system for automobiles, which selectively distributes cooling water of the internal combustion engine to the radiator, a heating device, and an oil cooler.

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